The two companies are using traditional British potato breeds that were popular years ago but have vanished from supermarket shelves in recent years due to their short growing season.
Among the heritage breeds are Red Duke of York, a variety with moist yellow flesh and a superb flavour; Red King Edward, a red version of the traditional King Edward that has white flesh; Edzell Blue, which has blue skin and white flesh; and British Queen, a 100-year-old variety well known for its good shape, white skin and white flesh.
A Greenvale representative said: "All these varieties are perfect for roasting and are set to regain pride of place on the British dining table."
Greenvale's growers are only producing the heritage varieties in small quantities to ensure that each harvest mimics the profiles of home-grown produce.
The Roasties potatoes are available in 1kg packs from Sainsbury's stores nationwide.